Results 11 to 20 of about 118,514 (262)

Direct Reduction of Bias of the Classical Hill Estimator

open access: yesRevstat Statistical Journal, 2005
In this paper we are interested in an adequate estimation of the dominant component of the bias of Hill’s estimator of a positive tail index γ, in order to remove it from the classical Hill estimator in different asymptotically equivalent ways.
Frederico Caeiro   +2 more
doaj   +1 more source

Minimum-Variance Reduced-Bias Tail Index and High Quantile Estimation

open access: yesRevstat Statistical Journal, 2008
Heavy tailed-models are quite useful in many fields, like insurance, finance, telecommunications, internet traffic, among others, and it is often necessary to estimate a high quantile, i.e., a value that is exceeded with a probability p, small.
Frederico Caeiro , M. Ivette Gomes
doaj   +1 more source

Statistical properties of an estimator for the mean function of a compound cyclic Poisson process in the presence of linear trend

open access: yesArab Journal of Mathematical Sciences, 2017
The problem of estimating the mean function of a compound cyclic Poisson process with linear trend is considered. An estimator of this mean function is constructed and investigated.
Bonno Andri Wibowo   +2 more
doaj   +1 more source

Variance based weighting of multisensory head rotation signals for verticality perception.

open access: yesPLoS ONE, 2020
We tested the hypothesis that the brain uses a variance-based weighting of multisensory cues to estimate head rotation to perceive which way is up.
Christopher J Dakin   +4 more
doaj   +1 more source

Bias reduction of a conditional maximum likelihood estimator for a Gaussian second-order moving average model

open access: yesModern Stochastics: Theory and Applications, 2021
In this study, we consider a bias reduction of the conditional maximum likelihood estimators for the unknown parameters of a Gaussian second-order moving average (MA(2)) model.
Fumiaki Honda, Takeshi Kurosawa
doaj   +1 more source

Nonparametric Estimation of ROC Surfaces Under Verification Bias

open access: yesRevstat Statistical Journal, 2020
Verification bias is a well known problem that can affect the statistical evaluation of the predictive ability of a diagnostic test when the true disease status is unknown for some of the patients under study.
Khanh To Duc   +2 more
doaj   +1 more source

Asymptotic properties of the Bernstein density copula for dependent data [PDF]

open access: yes, 2008
Copulas are extensively used for dependence modeling. In many cases the data does not reveal how the dependence can be modeled using a particular parametric copula. Nonparametric copulas do not share this problem since they are entirely data based.
BOUEZMARNI, Taoufik   +2 more
core   +7 more sources

A Study of Seven Asymmetric Kernels for the Estimation of Cumulative Distribution Functions

open access: yesMathematics, 2021
In this paper, we complement a study recently conducted in a paper of H.A. Mombeni, B. Masouri and M.R. Akhoond by introducing five new asymmetric kernel c.d.f.
Pierre Lafaye de Micheaux   +1 more
doaj   +1 more source

The Numerical Simulation for Asymptotic Normality of the Intensity Obtained as a Product of a Periodic Function with the Power Trend Function of a Nonhomogeneous Poisson Process

open access: yesDesimal, 2020
In this article, we provided a numerical simulation for asymptotic normality of a kernel type estimator for the intensity obtained as a product of a periodic function with the power trend function of a nonhomogeneous Poisson Process.
Ikhsan Maulidi   +2 more
doaj   +1 more source

Estimation of a Finite Population Mean under Random Nonresponse Using Kernel Weights

open access: yesJournal of Probability and Statistics, 2020
Nonresponse is a potential source of errors in sample surveys. It introduces bias and large variance in the estimation of finite population parameters. Regression models have been recognized as one of the techniques of reducing bias and variance due to ...
Nelson Kiprono Bii   +2 more
doaj   +1 more source

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